11 53 000 Removing and installing/replacing coolant thermostat (N55)

Special tools required:

WARNING: Risk of scalding.
Only perform this work after engine has cooled down.
Danger of injury.
Use only special tool 17 2 050 to lock and release spring strap.

Recycling

Observe country-specific waste disposal regulations.

Catch and dispose of drained coolant in a suitable container.

IMPORTANT: Protect plug connections against coolant and contamination.
Cover plug connections with suitable materials.

Necessary preliminary tasks:

Drain COOLANT at coolant pump.
Remove FAN COWL with electronic motor.

Disconnect plug connection (1) on coolant thermostat.

Fig 1: Identifying Plug Connection On Coolant Thermostat

G09875016

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock retaining clip (2) in upward direction.

Detach coolant hose (1) from coolant thermostat.

Fig 2: Identifying Retaining Clip And Coolant Hose

G09875017

Courtesy of BMW OF NORTH AMERICA, INC.

Lock hose clamp on coolant thermostat outlet with special tool 17 2 052 .

Detach coolant hose from thermostat.

Fig 3: Identifying Hose Clamp And Special Tool (17 2 052)

G09875018

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten hose clamp (1) on thermostat.

Tightening torque:11 53 8AZ .

Fig 4: Identifying Hose Clamp On Thermostat

G09875019

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on holder.

Tightening torque 11 53 2AZ .

Remove coolant thermostat.

Fig 5: Identifying Screw On Holder

G09875020

Courtesy of BMW OF NORTH AMERICA, INC.

WARNING: Danger of injury. Only use special tool 17 2 050 to lock and release spring strap.

Use special tool 17 2 051 to release spring strap.

Fig 6: Releasing Spring Strap

G09875021

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

FILLING AND VENT cooling system.